Warburton, W., & Warburton, W. (1978). [Works, 4]. Olms.
Lua i Stíl Chicago (17ú heag.)Warburton, William, agus William Warburton. [Works, 4]. Hildesheim [u.a.]: Olms, 1978.
Lua MLA (8ú heag.)Warburton, William, agus William Warburton. [Works, 4]. Olms, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.